Refrigerant leak detector compressor

Details Refrigerant leak detector compressor Refrigerant leak detector compressor

2007-02-27

2007-02-27

Williams, Hezron (Department: 2856)

Measuring and testing

With fluid pressure

Leakage

C073S04050R, C062S125000

Reexamination Certificate

active

10522145

ABSTRACT:
A motor control unit107that controls a drive device100of a brushless DC motor101of a compressor12in a refrigerator1determines that a flammable refrigerant is not leaking when it is determined that a duty variation width A(t) of a duty value D(t) detected at a detection time t exceeds a reference duty variation width Aa of a duty value D(t0) measured at a duty measurement reference time t0and a voltage value time rate-of-change ΔV of a voltage value V(t) of direct-current power exceeds a reference rate-of-change ΔVa.

REFERENCES:
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patent: 6499305 (2002-12-01), Pham et al.
patent: 2005/0039469 (2005-02-01), Nonaka et al.
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patent: 2001-165552 (2001-06-01), None
patent: 2002039649 (2002-02-01), None
patent: 2003214734 (2003-07-01), None
“International Search Report dated Jul. 1, 2003 for International Application No. PCT/JP03/02817.”

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